Reactive dyestuffs containing a difluoropyrimidine radical

ABSTRACT

Improved reactive dyestuffs of the following formula (I) ##STR1## in which the substituents have the meaning given in the description. The improved reactive dyestuffs are highly suitable for the dyeing and printing of natural or synthetic OH-- and/or amido-containing materials, in particular, those made of cellulose and polyamides.

The invention relates to reactive dyestuffs containing a difluoropyrimidine radical.

Although reactive radicals of this type have already been disclosed in German Auslegeschrift 1,644,204 (U.S. application No. 3,669,951) and DE-A-2,114,158 (U.S. application No. 4,065,446), some of them still have problems in practical application.

Furthermore, reactive dyestuffs containing other reactive groups and various chromophores have already been disclosed in EP-A 45,278 and EP-A 65,479 and in German Offenlegungsschrift 2,817,780. These dyestuffs too still need to be improved.

The present invention relates to reactive dyestuffs which, in the form of the free acid, have the formula ##STR2## in which

A is a chromophoric radical of one of the following structures ##STR3## or metal complexes of dyestuffs of the formulae (8)-(11) ##STR4## in which the bond between the chromophoric radical A and the 4-pyrimidinyl radical is effected via an amino or amino-methyl function on a ring C atom and A,

in which

R denotes H, a C₁ -C₆ -alkyl radical, a C₁ -C₆ -alkoxy radical,

R¹ denotes H, CH₃, C₂ H₃,

R² denotes NH₂, a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H, a C₁ -C₄ -alkoxy radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H,

R³ denotes a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H, a phenyl radical which is unsubstituted or substituted by C₁ -C₄ -alkyl, halogen or SO₃ H,

D represents a sulpho- or carboxy-containing radical of a diazo component from the benzene, naphthalene or hetaryl series, which additionally may be substituted by alkyl, alkoxy, carboxyl or halogen radicals, but in formula (6) one of the two radicals D contains an optionally substituted 2,6-difluoro-4-pyrimidinylamino, -methylamino or -ethylamino substituent, it being possible in this case for D to be free of sulpho groups or to contain sulpho groups.

K represents a coupling component, preferably pyridones, pyrazolones, barbituric acid and citrazinic acid derivatives, with the exception of compounds 15 and 16 ##STR5## which are described by F. Lehr in Dyes+Pigments 14 (1990), 239-63.

In a preferred embodiment, in the case of the metal complex dyestuffs, Cu (1:1 complex) or Cr and Co (1:2 complex) are preferred. Cr complexes and Co complexes can contain the azo compound of the abovementioned formula once or twice, i.e. they can have a symmetrical structure or, together with any desired other ligand groups, an unsymmetrical structure.

In a further preferred embodiment, the dyestuffs are present as salts, in particular as alkali metal salts or ammonium salts.

Formulae (2) to (14) show the sulpho-containing dyestuff in the form of the free acids. During preparation, the salts are in general obtained, in particular the alkali metal salts, such as sodium salts, potassium salts or lithium salts. However, the dyestuffs can also be used as concentrated solutions.

Preference is given to dyestuffs of the formula (I) where A is a radical of the formulae (2)-(12) in which

R is H, CH₃, OCH₃, OC₂ H₅,

R¹ is H, CH₃,

R² is NH₂, a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H,

R³ is CH₃, a phenyl radical which is unsubstituted or substituted by C₁ -C₄ -alkyl, halogen or SO₃ H.

Very particular preference is given to a) Dyestuffs of the formula (1) where A is a radical of the formula ( 2 ) in which R is H,

R¹ is H, CH₃,

R² is NH₂, a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H, and

D is ##STR6## b) Dyestuffs of the formula (1) where A is a radical of the formula (3) in which

R is H, CH₃, OC₂ H₅, R¹ is H, CH₃.

c) Dyestuffs of the formula (1) where A is a radical of the formulae (4)-(5) in which

R¹ is H, CH₃, R³ is CH₃, a phenyl radical which is unsubstituted or substituted by C₁ -C₄ -alkyl, halogen or SO₃ H.

d) Dyestuffs of the formula (1) where A is a radical of the formula ##STR7## in which

D is ##STR8## D¹ is ##STR9## R¹ is H, CH₃, n=m is 0 or 1 but n+m is 1.

e) Dyestuffs of the formula (1) where A is a radical of the formula ##STR10## in which R is H, CH₃, OCH₃, R¹ is H.

f) Dyestuffs of the formula (1) where A is a radical of the formulae (8) to (11), in which R is H.

g) Dyestuffs of the formula (1) where A is a radical of the formula (12), in which R is H and K has the abovementioned meaning.

The preparation of the dyestuffs (1) is carried out, for example, by the following processes:

1. By condensation of a reactive component of the formula ##STR11## with the corresponding dyestuff bases. 2. By azo coupling of a condensation product of the formulae ##STR12## with diazonium compounds, which may be obtained from the amines of the general formula ##STR13## in which R and R¹ have the meaning given, in the usual manner; 3. By diazotisation and coupling of an amine of the general formula ##STR14## condensed with 2,4,6-trifluoropyrimidine onto a coupling component of the formula ##STR15## in which D has the abovementioned meaning.

The reactive component 2,4,6-trifluoropyrimidine is known from German Auslegeschrift 2,114,158 (U.S. application No. 4,065,446) and can be obtained, for example, from 2,4,6-trichloropyrimidine by fluoride exchange using HF or alkali metal fluorides in aprotic solvents.

The dyestuffs according to the invention are highly suitable for the dyeing and printing of natural or synthetic OH-- and/or amido-containing materials, in particular those made of cellulose and polyamides. They are particularly suitable for the dyeing of cellulose materials by the exhaust and cold pad-batch method and for the printing of cellulose materials, such as cotton or staple viscose.

When mixed with other dyestuffs, the dyestuffs can be used for trichromatic dyeing.

Dyeings having good general fastness properties, in particular wet fastness properties, in combination with good build-up properties and high fixation yields are obtained.

EXAMPLE 1

23.6 g of 7-amino-1,3-naphthalenedisulphonic acid mono-sodium salt are stirred in 150 ml of water/30 g of ice and 20 ml of concentrated hydrochloric acid, and 17 ml of an aqueous sodium nitrite solution (300 g of NaNO₂ /l) are added dropwise at 5°-10° C. After stirring at 5°-10° C. for one hour, excess nitrous acid is removed using sulphamic acid.

This cream-coloured suspension is then metered into a neutral solution of the coupling component prepared from 13.5 g of N-(3-aminophenyl)-acetamide hydrochloride, 50 ml of water, 50 g of ice and about 30 ml of a 10% strength aqueous lithiumhydroxide solution over a period of 30 minutes. During this addition, the pH of the reaction mixture is kept constant at 6.0 to 6.5 with 20% aqueous potassium bicarbonate solution. If possible, the temperature should not exceed 10° C. After addition is complete, stirring is continued for another 30 minutes, during which the pH is still kept constant.

The coupling solution is warmed to 40° C., and 12 g of 2,4,6-trifluoropyrimidine are added. During the condensation reaction, the pH is kept constant at 5.8-6.2 with lithium hydroxide solution. After 3 hours, hardly any more change in the pH can be observed, and the condensation, according to TLC analysis, is complete. The dyestuff solution is clarified in order to separate off insoluble components, such as lithium fluoride, and salted out with 50 g of sodium chloride. The precipitated dyestuff is filtered off with suction and dried, giving 40 g of an orange-red powder (λmax=395.2 nm (H₂ O)), which has the structure ##STR16## and dyes cotton in golden yellow hues having excellent fastness properties.

By varying the diazo component D-NH₂ and the coupling component containing R, R¹ and R², further valuable golden yellow reactive dyestuffs of the formula ##STR17## which are listed in the table below, are available analogously to Example 1.

                                      TABLE 1                                      __________________________________________________________________________                                           λmax                              Ex.                                                                               D                 R  R.sup.1                                                                           R.sup.2    (H.sub.2 O)                              __________________________________________________________________________      2                                                                                 ##STR18##        H  H  NH.sub.2                                             3 "                 H  H  C.sub.2 H.sub.5                                      4 "                 H  H  CH.sub.2OH                                           5 "                 H  H  CH.sub.2OSO.sub.3 H                                  6 "                 H  H  CH.sub.2CH.sub.2COOH                                 7 "                 CH.sub.3                                                                          H  NH.sub.2                                             8 "                 H  CH.sub.3                                                                          NH.sub.2                                             9 "                 H  C.sub.2 H.sub.5                                                                   NH.sub.2                                            10 "                 H  C.sub.2 H.sub.5                                                                   CH.sub.3                                            11                                                                                 ##STR19##        H  H  NH.sub.2   406 nm                                   12 "                 H  H  CH.sub.3                                            13 "                 H  H  C.sub. 2 H.sub.5                                    14 "                 H  H  CH.sub.2OH                                          15 "                 H  H  CH.sub.2OSO.sub.3 H                                 16 "                 H  H  CH.sub.2CH.sub.2COOH                                17 "                 CH.sub.3                                                                          H  NH.sub.2                                            18 "                 H  CH.sub.3                                                                          NH.sub.2                                            19 "                 H  C.sub.2 H.sub.5                                                                   NH.sub.2                                            20 "                 H  C.sub.2 H.sub.5                                                                   CH.sub.3                                            21                                                                                 ##STR20##        H  H  NH.sub.2   420 nm                                   22 "                 H  H  CH.sub.3   401 nm                                   23 "                 H  H  C.sub.2 H.sub.5                                     24 "                 H  H  CH.sub.2 OH                                         25 "                 H  H  CH.sub.2OSO.sub.3 H                                 26 "                 H  H  CH.sub.2CH.sub.2COOH                                27 "                 CH.sub.3                                                                          H  NH.sub.2                                            28 "                 H  CH.sub.3                                                                          NH.sub.2                                            29 "                 H  C.sub.2 H.sub.5                                                                   NH.sub.2                                            30 "                 H  C.sub.2 H.sub.5                                                                   CH.sub. 3                                           31                                                                                 ##STR21##        H  H  NH.sub.2                                            32 "                 H  H  C.sub.2 H.sub.5                                     33 "                 H  H  CH.sub.2OH                                          34 "                 H  H  CH.sub.2OSO.sub.3 H                                 35 "                 H  H  CH.sub.2CH.sub.2COOH                                36 "                 CH.sub.3                                                                          H  NH.sub.2                                            37 "                 H  CH.sub.3                                                                          NH.sub.2                                            38 "                 H  C.sub.2 H.sub.5                                                                   NH.sub.2                                            39 "                 H  C.sub.2 H.sub.5                                                                   CH.sub.3                                            __________________________________________________________________________

EXAMPLE 40

10.4 g of 7-amino-4-hydroxy-2-naphthalenesulphonic acid are dissolved in 150 ml of water at a pH of 7 using lithium hydroxide. 7.6 g of 2,4,6-trifluoropyrimidine are added, the reaction mixture is heated to 40° C. and the pH is maintained at the same time at 6.5 with lithium carbonate solution. After stirring for 3 hours, the mixture is cooled to 10° C. and, while maintaining the pH at 6.5 with lithium carbonate solution, a suspension of 14.1 g of diazotised 1,5-naphthalenesulphonic acid are added. After 1 hour, azo coupling is complete, and the dyestuff is salted out, isolated and dried; it has the formula ##STR22## (λmax=485 nm (H₂ O)) and dyes cotton in brilliant orange shades having very good wet fastness properties.

A further method to prepare the dyestuff from Example 40 consists in condensing the azo dyestuff of the formula ##STR23## with 2,4,6-trifluoropyrimidine at a pH of 6.5-7.5.

By varying the diazo component D-NH₂ and the coupling component K¹ H₂, the dyestuffs of the general formula ##STR24## listed in the table below, which dye cotton in the hues mentioned, can be prepared analogously to Example 40.

                                      TABLE 2                                      __________________________________________________________________________                                             Hue                                                                            λmax                            Ex.                                                                               D              K.sup.1            R.sup.1                                                                           (H.sub.2 O)                            __________________________________________________________________________     41                                                                                 ##STR25##                                                                                     ##STR26##         H  orange                                 42                                                                                 ##STR27##     "                  H  yellowish red                          43                                                                                 ##STR28##     "                  H  orange                                 44                                                                                 ##STR29##     "                  H  orange                                 45                                                                                 ##STR30##     "                  H  orange                                 46                                                                                 ##STR31##                                                                                     ##STR32##         CH.sub.3                                                                          orange                                 47                                                                                 ##STR33##     "                  H  yellowish red                          48                                                                                 ##STR34##     "                  CH.sub.3                                                                          yellowish red                          49 "              "                  C.sub.2 H.sub.5                                                                   yellowish red                          50                                                                                 ##STR35##                                                                                     ##STR36##         H  red                                    51                                                                                 ##STR37##     "                  H  yellowish red                          52                                                                                 ##STR38##                                                                                     ##STR39##         H  yellowish red                          53                                                                                 ##STR40##     "                  H  yellowish red                          54                                                                                 ##STR41##     "                  H  orange                                 55                                                                                 ##STR42##     "                  H  orange                                 56                                                                                 ##STR43##     "                  H  red                                    57                                                                                 ##STR44##                                                                                     ##STR45##         H  red                                    58                                                                                 ##STR46##     "                  CH.sub.3                                                                          yellowish red                          59                                                                                 ##STR47##     "                  C.sub.2 H.sub.5                                                                   yellowish red                          __________________________________________________________________________

EXAMPLE 60

29.6 g of 1,3-diaminobenzene-6-sulphonic acid are dissolved in 250 ml of water at pH 6.5. After addition of 0.75 g of sodium dihydrogen phosphate×2 H₂ O and 0.75 g of disodium hydrogen phosphate×12 H₂ O, 15 ml of 2,4,6-trifluoropyrimidine are added dropwise. The mixture is stirred at 50° C. for 6 hours, during which the pH is maintained at 6.5 with sodium carbonate solution. After clarification using activated carbon, the dyestuff intermediate is diazotised at 0° C. with 7 ml of concentrated hydrochloric acid and 9 ml of 30% strength sodium nitrite solution, and the diazotised product is added to a previously introduced solution of 31.2 g of 1-benzoyl-amino-8-hydroxy-naphthalene-3,6-disulphonic acid, during which the pH is maintained at 7 with sodium carbonate solution. After 1 hour, the coupling reaction to give the dyestuff is complete, and the dyestuff is salted out, filtered off with suction, washed and dried at about 50° C. in vacuo. It has the following structure ##STR48## and dyes cellulose materials in a clear bluish red shade.

An alternative preparation process consists in condensing a dyestuff base of the structure ##STR49## with 2,4,6-trifluoropyrimidine at pH 6-7 and 50° C.

By varying the diazo component HD² NH₂ and the coupling component KH, the dyestuffs of the general formula ##STR50## listed in the table below, which dye cotton in red to bluish red hues, can be prepared analogously to Example 60.

                  TABLE 3a                                                         ______________________________________                                                                                λmax                             Ex.  D.sup.2    K                 R.sup.1                                                                             (H.sub.2 O)                             ______________________________________                                         61                                                                                   ##STR51##                                                                                 ##STR52##        H                                            62                                                                                   ##STR53## "                 H                                            63                                                                                   ##STR54## "                 CH.sub.3                                     64                                                                                   ##STR55## "                 H                                            65                                                                                   ##STR56##                                                                                 ##STR57##        H                                            66                                                                                   ##STR58## "                 H                                            67                                                                                   ##STR59## "                 CH.sub.3                                     68                                                                                   ##STR60## "                 H                                            69                                                                                   ##STR61##                                                                                 ##STR62##        H                                            70                                                                                   ##STR63## "                 CH.sub.3                                     71                                                                                   ##STR64## "                 H    543 nm                                  72                                                                                   ##STR65##                                                                                 ##STR66##        H                                            73                                                                                   ##STR67##                                                                                 ##STR68##        H                                            74                                                                                   ##STR69## "                 CH.sub.3                                     75                                                                                   ##STR70## "                 H    512 nm                                  ______________________________________                                    

By varying the diazo component D-NH₂ and the coupling component K¹ H₂, the dyestuffs of the general formula ##STR71## listed in the table below can be prepared analogously to Example 60. They dye cotton in red to bluish red hues.

                                      TABLE 3b                                     __________________________________________________________________________                                               λmax                          Ex.                                                                               D          K.sup.1                  R.sup.1                                                                           (H.sub.2 O)                          __________________________________________________________________________     76                                                                                 ##STR72##                                                                                 ##STR73##               H  535 nm                               77                                                                                 ##STR74##                                                                                 ##STR75##               H                                       78                                                                                 ##STR76##                                                                                 ##STR77##               CH.sub.3                                79 "                                                                                          ##STR78##               H                                       80                                                                                 ##STR79## "                        H                                       81                                                                                 ##STR80## "                        CH.sub.3                                __________________________________________________________________________

EXAMPLE 82

49.2 g of the diazotisation solution from Example 60 are metered into a solution of 82.5 g of the monoazo compound of the formula ##STR81## in 500 ml of water at a pH of 7 over a period of 15 to 20 minutes, during which the pH is maintained between 6 and 8 by addition of a 20% strength sodium carbonate solution. To complete the coupling reaction, stirring of the mixture at a pH of 7-8 is continued for 1 hour, and the dyestuff is then salted out by addition of 70 g of common salt. Isolation and drying gives about 150 g of a salt-containing black dyestuff powder which has the structure ##STR82## and dyes cotton in navy to black hues by the dyeing or printing processes customary for reactive dyestuffs.

This reactive dyestuff can also be prepared by condensing a solution of 133.4 g of the diazo dyestuff base of the formula ##STR83## in 750 ml of water at 50° C. and a constant pH of 6-7, (addition of sodium carbonate solution) with 24 g of 2,4,6-trifluoropyrimidine and isolating the dyestuff at 20°-25° C. as described above.

Further valuable reactive dyestuffs are obtained by varying, analogously to Example 82, the diazo components as follows:

                                      TABLE 4                                      __________________________________________________________________________      ##STR84##                                                                     Example                                                                             ZBD                D'                    Hue                              __________________________________________________________________________     83                                                                                   ##STR85##                                                                                         ##STR86##            navy/black (610 nm)              84   "                                                                                                  ##STR87##            navy (602 nm)                    85   "                                                                                                  ##STR88##            greenish blue                    86                                                                                   ##STR89##                                                                                         ##STR90##            navy (611 nm)                    87   "                                                                                                  ##STR91##            navy/black (600 nm)              88   "                                                                                                  ##STR92##            navy                             89                                                                                   ##STR93##                                                                                         ##STR94##            greenish black                   90   "                                                                                                  ##STR95##            dark green                       91   "                                                                                                  ##STR96##            "                                92                                                                                   ##STR97##                                                                                         ##STR98##            greenish dark blue               93   "                                                                                                  ##STR99##            "                                94                                                                                   ##STR100##                                                                                        ##STR101##           greenish dark blue               95                                                                                   ##STR102##                                                                                        ##STR103##           reddish navy                     96   "                                                                                                  ##STR104##           "                                97   "                                                                                                  ##STR105##           navy/black                       98                                                                                   ##STR106##                                                                                        ##STR107##           greenish black                   99   "                                                                                                  ##STR108##           navy                             100                                                                                  ##STR109##                                                                                        ##STR110##           navy/black                       101                                                                                  ##STR111##                                                                                        ##STR112##           "                                102                                                                                  ##STR113##                                                                                        ##STR114##           navy/black                       103  "                                                                                                  ##STR115##           "                                104  "                                                                                                  ##STR116##           dark green/black                 105  "                                                                                                  ##STR117##           greenish blue                    __________________________________________________________________________

EXAMPLES 107 to 130

Dyestuffs of these examples are obtained by using in Example 82 to 105 1-amino-8-hydroxy-4,6-naphthalenedisulphonic acid instead of the coupling component 1-amino8-hydroxy-3,6-naphthalenedisulphonic acid. By way of example, Example 107 is shown in the form of a formula: ##STR118##

EXAMPLE 131

A solution of 52.6 g of 1-amino-8-hydroxy-3,6-naphthalenedisulphonic acid disodium salt in 250 ml of water is metered into the diazonium salt suspension of 49.2 g of the diazotisation solution from Example 60 over a period of 15 minutes. The mixture is stirred at a pH of 1.5-2.5 and a temperature of 5°-10° C. for one hour. The pH is then increased to 3.5 by slow addition of a 20% strength sodium acetate solution, and the mixture is stirred at this pH at 10° to 20° C. for another 3 hours. After coupling is complete, the pH is brought to 7.5 with 20% strength sodium carbonate solution.

The mixture of a diazoniumsalt obtained by diazotisation of 47.1 g of 2-amino-1,5-naphthalenedisulphonic acid monosodium salt is added to this red coupling solution over a period of 30 minutes, during which the pH is maintained in the range from 6.5 to 8.0 by addition of 20% strength sodium carbonate solution. The mixture is stirred at a pH of 7-8 for another 2 hours, and the product is salted out with a sufficient amount of potassium chloride. The precipitated dyestuff is isolated by filtering it off with suction and dried. The black dyestuff powder, which has the structure ##STR119## dyes cotton in navy to black hues.

The reactive dyestuff can also be prepared by condensation of 2,4,6-trifluoropyrimidine with the disazo dye-stuff base of the formula ##STR120## By varying the fibre-reactive and also the non-fibre-reactive diazo component, further interesting reactive dye-stuffs can be synthesised analogously to Example 131:

                                      TABLE 5                                      __________________________________________________________________________      ##STR121##                                                                    Example                                                                             D                     D'BA          Hue                                   __________________________________________________________________________     132                                                                                  ##STR122##                                                                                           ##STR123##   navy (606 nm)                         133                                                                                  ##STR124##           "             navy (608 nm)                         134                                                                                  ##STR125##           "             navy                                  135                                                                                  ##STR126##           "             navy                                  136                                                                                  ##STR127##           "             greenish black                        137                                                                                  ##STR128##                                                                                           ##STR129##   greenish black                        138                                                                                  ##STR130##           "             greenish navy                         139                                                                                  ##STR131##           "             "                                     140                                                                                  ##STR132##                                                                                           ##STR133##   navy                                  141                                                                                  ##STR134##                                                                                           ##STR135##   navy                                  142                                                                                  ##STR136##                                                                                           ##STR137##   greenish blue                         143                                                                                  ##STR138##           "             "                                     144                                                                                  ##STR139##                                                                                           ##STR140##   "                                     145                                                                                  ##STR141##           "             "                                     146                                                                                  ##STR142##                                                                                           ##STR143##   navy                                  147                                                                                  ##STR144##           "             "                                     148                                                                                  ##STR145##           "             "                                     149                                                                                  ##STR146##           "             "                                     150                                                                                  ##STR147##                                                                                           ##STR148##   dark green                            151                                                                                  ##STR149##           "             navy black                            152                                                                                  ##STR150##           "             "                                     153                                                                                  ##STR151##           "             greenish navy                         154                                                                                  ##STR152##                                                                                           ##STR153##   greenish navy                         155                                                                                  ##STR154##           "             "                                     156                                                                                  ##STR155##           "             greenish black                        157                                                                                  ##STR156##                                                                                           ##STR157##   dark green                            158                                                                                  ##STR158##                                                                                           ##STR159##   navy                                  159                                                                                  ##STR160##                                                                                           ##STR161##   greenish black                        160                                                                                  ##STR162##                                                                                           ##STR163##   greenish black                        __________________________________________________________________________

EXAMPLES 161 to 190

Dyestuffs of these examples are obtained by using in Example 131 to 160 1-amino-8-hydroxy-4,6-naphthalenedisulphonic acid instead of the coupling component 1-amino-8-hydroxy-3,6-naphthalenedisulphonic acid. The hues of Examples 161 to 190 are all somewhat more reddish on cotton than the analogous dye-stuffs 131 to 160, such as, for example, Example 161: ##STR164## (somewhat more reddish than Example 131).

EXAMPLE 191

15.4 g of 2,4,6-trifluoropyrimidine are introduced into a neutralised solution of 41.9 g of 1-amino-4-(3'-amino-2'-methyl-5'-sulphophenylamino)-anthraquinone in 500 ml of water. While maintaining the pH at 6-7 with sodium carbonate solution, the mixture is stirred at 40°-50° C. until condensation is complete. The dye-stuff is salted out with sodium chloride, filtered off with suction and washed with 10% strength sodium chloride solution. The blue powder obtained after drying at 40° C. in vacuo has the formula: ##STR165## and dyes cotton in neutral blue shades (λmax 592 nm (H₂ O)).

EXAMPLE 192

The procedure of Example 191 is repeated, using 21 g of 1-amino-4-(3'-amino-4'-sulphophenylamino)-anthraquinone-2-sulphonic acid, giving a dye-stuff of the formula ##STR166## which dyes cotton in blue hues (λmax=596 nm (H₂ O)).

EXAMPLES 193 to 211

If the aminoazo compounds listed in Table 6 below are reacted at pH 5-8 and temperatures of 40°-60° C. with 2,4,6-trifluoropyrimidine, dyestuffs are obtained which dye cotton in the hues given.

                                      TABLE 6                                      __________________________________________________________________________     Ex.                                                                               Aminoazo compound                 Hue   λmax (H.sub.2 O)             __________________________________________________________________________     193                                                                                ##STR167##                       deep red                                  194                                                                                ##STR168##                       deep red                                  195                                                                                ##STR169##                       deep red                                  196                                                                                ##STR170##                       deep red                                  197                                                                                ##STR171##                       deep red                                  198                                                                                ##STR172##                       deep red                                  199                                                                                ##STR173##                       deep red                                  200                                                                                ##STR174##                       deep red                                  201                                                                                ##STR175##                       deep red                                  202                                                                                ##STR176##                       deep red                                  203                                                                                ##STR177##                       deep red                                  204                                                                                ##STR178##                       deep red                                  205                                                                                ##STR179##                       deep red                                  206                                                                                ##STR180##                       red-violet                                207                                                                                ##STR181##                       deep red                                  208                                                                                ##STR182##                       deep red                                  209                                                                                ##STR183##                       blue  592 nm                              210                                                                                ##STR184##                       blue                                      211                                                                                ##STR185##                       navy                                      __________________________________________________________________________

EXAMPLES 212 to 217

If the aminoazo compounds listed in Table 7 below are reacted in a known manner with equimolar amounts of hydrogen peroxide and copper sulphate and the dye-stuff bases formed are condensed to pH 5 to 8 and 40° to 60° C. with 2,4,6-trifluoropyrimidine, copper complex dyestuffs are obtained which dye cotton in the hues given, for example from the aminoazo compound from Example 212 the dye-stuff of the formula ##STR186## is obtained.

                                      TABLE 7                                      __________________________________________________________________________     Ex.                                                                               Aminoazo compound           Hue  λmax (H.sub.2 O)                    __________________________________________________________________________     212                                                                                ##STR187##                 deep red                                        213                                                                                ##STR188##                 deep red                                        214                                                                                ##STR189##                 deep red                                        215                                                                                ##STR190##                 deep red                                        216                                                                                ##STR191##                 blue                                            217                                                                                ##STR192##                 navy 560 nm                                     __________________________________________________________________________

EXAMPLES 218 to 222

If the corresponding dye-stuff bases are reacted with 2,4,6-trifluoropyrimidine at pH 5-8 and 40°-60° C., the following dyestuffs are obtained, which dye cotton in the hues given: ##STR193## 

We claim:
 1. A reactive dye-stuff which, in the form of the free acid, has the formula (I)in which A is a chromophoric radical of one of the following structures ##STR194## or a metal complex of dyestuffs of the formulae (8)-(11) ##STR195## in which R denotes H, a C₁ -C₆ -alkyl radical, a C₁ -C₆ -alkoxy radical, R¹ denotes H, R² denotes NH₂, a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H, a C₁ -C₄ -alkoxy radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H, R³ denotes a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H, a phenyl radical which is unsubstituted or substituted by C₁ -C₄ -alkyl, halogen or SO₃ H, D represents a sulpho- or carboxy-containing radical of a diazo component from the benzene, naphthalene or hetaryl series, which additionally may be substituted by alkyl, alkoxy, carboxyl or halogen radicals. In formula (6) one of the two radicals D contains an optionally substituted 2,6-difluoro-4-pyrimidinylamino, -methylamino or -ethylamino substituent, it being possible in this case for D to be free of sulpho groups or to contain sulpho groups. K represents a coupling component, with the exception of compounds 15 and 16 ##STR196##
 2. Reactive dye-stuff according to claim 1, characterised in that K is a pyridone, pyrazolone, barbituric acid or citrazinic acid derivative.
 3. Reactive dye-stuff according to claim 1, characterised in that A is a radical of the formula 2 to 12, in whichR is H, CH₃, OCH₃, OC₂ H₅, R¹ is H, CH₃, R² is NH₂, a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H,
 4. Reactive dye-stuff according to claim 1a) wherein A is a radical of the formula (2), in whichR is H, R¹ is H, R² is NH₂, a C₁ -C₄ -alkyl radical which is unsubstituted or substituted by OH, SO₃ H, OSO₃ H or CO₂ H, and D is ##STR197## b) wherein A is a radical of the formula (3), in which R is H, CH₃, OC₂ H₅, R¹ is H, or c) wherein A is a radical of the formula (4)-(5), in whichR¹ i s H, R³ is CH₃, a phenyl radical which is unsubstituted or substituted by C₁ -C₄ -alkyl, halogen or SO₃ H, or d) wherein A is a radical of the formula ##STR198## in which D is ##STR199## D¹ is ##STR200## R¹ is H n is 0 or 1, and m is 0 or 1 but n+m is 1, or e) wherein A is a radical of the formula ##STR201## in which R is H, CH₃, OCH₃,R¹ is H, or f) wherein A is a radical of the formula (12), in which R is H, or g) wherein A is a radical of the formula (12), in which R is H and K has the abovementioned meaning.
 5. Reactive dyestuff according to claim 1 of one of the following formulas ##STR202## 